Question

Set-theoretic equality of splitting fields within a fixed algebraic closure

score 175 · Answer 1 · 2026-03-25 07:58:46

175

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Set-theoretic equality of splitting fields within a fixed algebraic closure

Published on 25 Mar 2026 - 7:58

score 45 · Answer 2 · 2026-03-22 02:37:48

45

Views

Subsets and simple set operations

Published on 22 Mar 2026 - 2:37

score 84 · Answer 3 · 2026-03-24 23:42:46

84

Views

1:1 Matching with Uncountable Sets

Published on 24 Mar 2026 - 23:42

score 348 · Answer 4 · 2026-03-22 12:11:28

If $A$ is a set with $m$ elements and $C \subseteq A$ is a set with $1$ element, then prove that $A \setminus C$ is a set with $m-1$ elements

score 724 · Answer 5 · 2026-04-01 14:20:51

724

Views

Bijection between $\mathbb N^2$ and $\mathbb N$

Published on 01 Apr 2026 - 14:20

score 127 · Answer 6 · 2026-03-26 14:23:06

127

Views

The terminology of a set and subset of a simple number in base 2

Published on 26 Mar 2026 - 14:23

score 114 · Answer 7 · 2026-03-25 04:43:31

114

Views

Let $A$ be a finite set such that $|A|=n+1$ for some $2\le n$ and let $R\subseteq A\times A$ be some reflexive relation in $A$. Prove the following:

Published on 25 Mar 2026 - 4:43

score 99 · Answer 8 · 2026-04-11 00:49:32

99

Views

Can two filters be "separated"?

Published on 11 Apr 2026 - 0:49

score 302 · Answer 9 · 2026-03-22 04:41:23

302

Views

Show that $A\times B=B\times A$ if and only if $A=B.$

Published on 22 Mar 2026 - 4:41

score 53 · Answer 10 · 2026-03-22 06:27:04

53

Views

Why $\{x:x=E \mbox{ or } x=\{E\} \mbox{ or } x=\{E,\{E,\{E\}\}\} \,\}$ contradicts Axiom of Regularity?

Published on 22 Mar 2026 - 6:27

score 515 · Answer 11 · 2026-04-03 13:44:42

515

Views

What does $t \in \mathbb{N}_0$ mean?

Published on 03 Apr 2026 - 13:44

score 1.3k · Answer 12 · 2026-03-21 19:57:20

1.3k

Views

Creating a bijective function from $\mathbb{N}$ to the even integers

Published on 21 Mar 2026 - 19:57

score 94 · Answer 13 · 2026-03-21 22:05:15

Since the null/empty set is the subset of every set, why is the powerset of {a} different from the powerset of $\{a,\emptyset\}$

score 15 · Answer 14 · 2026-03-21 23:45:27

15

Views

Constructing a codomain for a bijective function

Published on 21 Mar 2026 - 23:45

score 24 · Answer 15 · 2018-02-07 03:02:09

24

Views

Cartesian product of sets of sets.

Published on 07 Feb 2018 - 3:02

List Question

Set-theoretic equality of splitting fields within a fixed algebraic closure

Subsets and simple set operations

1:1 Matching with Uncountable Sets

If $A$ is a set with $m$ elements and $C \subseteq A$ is a set with $1$ element, then prove that $A \setminus C$ is a set with $m-1$ elements

Bijection between $\mathbb N^2$ and $\mathbb N$

The terminology of a set and subset of a simple number in base 2

Let $A$ be a finite set such that $|A|=n+1$ for some $2\le n$ and let $R\subseteq A\times A$ be some reflexive relation in $A$. Prove the following:

Can two filters be "separated"?

Show that $A\times B=B\times A$ if and only if $A=B.$

Why $\{x:x=E \mbox{ or } x=\{E\} \mbox{ or } x=\{E,\{E,\{E\}\}\} \,\}$ contradicts Axiom of Regularity?

What does $t \in \mathbb{N}_0$ mean?

Creating a bijective function from $\mathbb{N}$ to the even integers

Since the null/empty set is the subset of every set, why is the powerset of {a} different from the powerset of $\{a,\emptyset\}$

Constructing a codomain for a bijective function

Cartesian product of sets of sets.

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